The dot plots below show the number of gym members who attended two different aerobics classes over a six-week period. Each class met three times per week.The variability for each class is 4. The difference between the mean number of gym members for each class is approximately how many times the variability? A. 3 B. 2 C. 5 D. 4

Select the correct answer from each drop-down menu.Jacob surveyed members of three different gyms and recorded the number of hours they exercised last week. The mean and standard deviation (SD), of the data he gathered, is shown in the table.Gym A Gym B Gym CMean = 7SD = 2.9 Mean = 8SD = 4.2 Mean = 6SD = 3.2Use the information in the table to complete the following statement.The members of gym show the most consistency in the number of hours they exercised last week, because the of this data set is the .

Select all the correct answers.The dot plot shows the number of classes per semester that a group of boys and girls have chosen to take in their freshman year of college. Which statements correctly describe the two data sets? The difference of the means is 1.5. The difference of the means is 0.5. The difference of the means is about one-third the mean absolute deviation of either data set. The difference of the means is 1. The difference of the means is about one-half the mean absolute deviation of either data set.

An instructor recommends to students in his introductory statistics class to spend at least 5 hours studying outside class. One of the items on the student survey for this course was "How many hours a week do you study for this class?” The instructor examined the data for men and women separately. Below is the distribution of this variable for the 30 women in the class.Part C: Which of the following boxplots represents the same data set as the histogram shown above?

24 The dot plots represent the distributions of values in data sets A and B. Data Set A Data Set B Which of the following statements must be true? I. The median of data set A is equal to the median of data set B. II. The standard deviation of data set A is equal to the standard deviation of data set B. A) I only B) II only C) I and II D) Neither I nor II

Company X is considering employing one of the two training programs. Group 1 was trained by program A, group 2 by program C. For the first group, the time required to train the employees had an average of of 32.11 hours and a variation of 68.09 hours, while for the second group, the mean is 19.75 hour while the variation is 71.14. Which training program has less relative variability in its performance? Program A (18.97 percent) Program B (19.87 percent) Program A (19.87 percent) Program B (18.97 percent)